Gestational diabetes

During 13week of pregnancy glucose test after 50gm glucose intake (and sample taken after one hour) is carried out which revealed 178mg/dL(abnormal).But test carried out after 75gm glucose intake (and sample taken after two hours) revealed 121mg/dL(which is less than 140mg/dL and therefore normal).Does it mean the patient is diabetic?the fasting glucose is 104mg/dL